Fix email links broken in Outlook and standardize all email URLs

- Rewrite ctaButton to use td-background pattern (works in all clients
  including Outlook, Gmail, Yahoo, Apple Mail) instead of VML/conditional
  comments that broke link clicking in Outlook desktop
- Add plaintext fallback URL below every CTA button so users always have
  a working link even if the button fails
- Add getBaseUrl() and ensureAbsoluteUrl() helpers in email.ts to
  guarantee all email links are absolute https:// URLs
- Apply ensureAbsoluteUrl safety net in sendStyledNotificationEmail and
  sendNotificationEmail so relative paths can never reach email templates
- Standardize all NEXTAUTH_URL fallbacks to https://portal.monaco-opc.com
  (was inconsistently http://localhost:3000 or https://monaco-opc.com)
- Fix legacy notification.ts: wrong argument order in
  sendJuryInvitationEmail (URL was passed as name parameter)
- Fix legacy notification.ts: missing NEXTAUTH_URL fallback for
  evaluation reminder URL construction
- Change tooltip styling from red bg to white bg with black text

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server/services/in-app-notification.ts

@@ -6,7 +6,7 @@
  */
 
 import { prisma } from '@/lib/prisma'
-import { sendStyledNotificationEmail } from '@/lib/email'
+import { sendStyledNotificationEmail, ensureAbsoluteUrl } from '@/lib/email'
 
 // Notification priority levels
 export type NotificationPriority = 'low' | 'normal' | 'high' | 'urgent'
@@ -427,8 +427,7 @@ async function maybeSendEmailWithSetting(
     }
 
     // Ensure linkUrl is absolute for emails (relative paths break in email clients)
-    const baseUrl = process.env.NEXTAUTH_URL || 'https://portal.monaco-opc.com'
-    const absoluteLinkUrl = linkUrl && linkUrl.startsWith('/') ? `${baseUrl}${linkUrl}` : linkUrl
+    const absoluteLinkUrl = ensureAbsoluteUrl(linkUrl)
 
     await sendStyledNotificationEmail(
       user.email,